Improved fan-blower



UNITED STATES PATENT GEEICE.

CHESTER P. MARSHALL, OF FITCIIBURG, MASSACHUSETTS.

IMPROVED FAN-BLOWER.

Specification forming part of Letters Patent No. 16,547', dated February 3, 1857.

To all whom it may concern:

Be it known that I, CHESTER?. MARSHALL, of Fitchburg, in the county of Vtorcester, in the State of Massachusetts, have invented a new and useful Improvement in Fan-Blowers; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon and making a part of this specilication.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction.

Figure l is a plan. Fig. 2 is an end elevation. Fig. 3 is a section at line a l), on Fig. 4, showing the stationary partitions g in tube c. Fig. 4 is a sectional side elevation showing the interior of tube c and the case h. Fig. 5 is an elevation with the tube c removed, showing the fans in front.

The fans or wings CZ are secured in a hub e upon the end of a shaft f, making an angle of about forty-live degrees with the axis of the shaft f, said shaft being` supported by a head-stock il, similar to those of a common lathe. The head-stock t' and the case h are secured to a sole-plate j by means of screws passing through the sole-plate into said parts. The shaft and fans are driven by a belt applied to a pulley k, causing them to rotate in the direction indicated by the arrow. The

of the fans, the edges of the partitions and,

fans being nearly in contact, thereby preventing a rotation of the current of air next the fans and causing a greater strength of blast.

The Well-known fact that rotating fans will cause the air to rotate and diverge has induced me to make the within-described improvement. Therefore WVhat I claim as my improvement, and desire to secure by Letters Patent-is the following:

The application of fixed partitions in the conducting air-tubes of fan-blowers, in the manner and for the purpose herein described, or in any other Way which shall be substantially the same.

CHESTER P. MARSHALL. \Vit11esses:

SAML. L. HAY, W. H. L. SMITH. 

